[jira] [Created] (ARROW-12759) [C++][Compute] Wrap grouped aggregation in an ExecNode

[Ben Kietzman (Jira)]

Ben Kietzman created ARROW-12759:
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             Summary: [C++][Compute] Wrap grouped aggregation in an ExecNode
                 Key: ARROW-12759
                 URL: https://issues.apache.org/jira/browse/ARROW-12759
             Project: Apache Arrow
          Issue Type: New Feature
          Components: C++
            Reporter: Ben Kietzman
             Fix For: 5.0.0


ARROW-11928 adds ExecNodes, to which GroupByNode should be added so that a 
dataset scan can terminate in a grouped aggregation



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